The invention belongs to the technical field of warming and temperature adjustment, and relates to a method for heating and adjusting temperature of a plant heat collector in winter. The method comprises the following steps of firstly, constructing a heat collector frame according to the structure of the conventional vegetable heat collector, and spreading a transmitting thin film material on the top side face of the heat collector frame; then selecting a biomass fuel combustion heat collecting device, and fixedly arranging a combustion chamber, a flue, a smoke box and a smoke ventilator in the heat collector; and filling the collected biomass fuel in the combustion heat collecting device, igniting the biomass fuel, switching on the electric smoke ventilator to make the fuel in the combustion heat collecting device completely combusted and dissipate heat to adjust and raise the temperature of the heat collector through the combustion chamber, the flue and the smoke box in the combustion heat collecting device, regularly recycling dust in each dust box, adding clear water, and stacking in a pit for natural fermentation, so as to prepare a biomass organic fertilizer. The design principle is reliable, the heating process is simple, the fuel is easily obtained, the combustion heat efficiency is high, the heating and temperature adjusting effect is good, and the environment friendliness is realized.